Polarized light means restricting the vibration of the light particles in a single plane. Unpolarized light means the lighting is not having vibration restricted in a single plane. For polarized light, the x-and y-components of the electric field has a constant phase difference between them. In Unpolarized light, the phase difference between the x-and y-components of the electric field changes unpredictably.
In industry, Polaroid filters are used to perform stress analysis tests on transparent plastics. As light passes through a plastic, each color of visible light is polarized with its own orientation. If such a plastic is placed between two polarizing plates, a colorful pattern is revealed. As the top plate is turned, the color pattern changes as new colors become blocked and the formerly blocked colors are transmitted.
A common Physics demonstration involves placing a plastic protractor between two Polaroid plates and placing them on top of an overhead projector. It is known that structural stress in plastic is signified at locations where there is a large concentration of colored bands. This location of stress is usually the location where structural failure will most likely occur. Perhaps you wish that a more careful stress analysis were performed on the plastic case of the CD that you recently purchased.
Polarization is also used in the entertainment industry to produce and show 3-D movies. Three-dimensional movies are actually two movies being shown at the same time through two projectors. The two movies are filmed from two slightly different camera locations. Each individual movie is then projected from different sides of the audience onto a metal screen. The movies are projected through a polarizing filter. The polarizing filter used for the projector on the left may have its polarization axis aligned horizontally while the polarizing filter used for the projector on the right would have its polarization axis aligned vertically.
Consequently, there are two slightly different movies being projected onto a screen. Each movie is cast by light that is polarized with an orientation perpendicular to the other movie. The audience then wears glasses that have two Polaroid filters. Each filter has a different polarization axis - one is horizontal and the other is vertical. The result of this arrangement of projectors and filters is that the left eye sees the movie that is projected from the right projector while the right eye sees the movie that is projected from the left projector.
This gives the viewer a perception of depth. Our model of the polarization of light provides some substantial support for the wavelike nature of light. It would be extremely difficult to explain polarization phenomenon using a particle view of light. Polarization would only occur with a transverse wave.
For this reason, polarization is one more reason why scientists believe that light exhibits wavelike behavior. Suppose that light passes through two Polaroid filters whose polarization axes are parallel to each other. What would be the result? The first filter will polarize the light, blocking one-half of its vibrations. The second filter will have no affect on the light. Being aligned parallel to the first filter, the second filter will let the same light waves through.
Light becomes partially polarized as it reflects off nonmetallic surfaces such as glass, water, or a road surface. Reflected light becomes partially polarized in a plane which is parallel to the reflecting surface.
Consider the three pairs of sunglasses below. Identify the pair of glasses is capable of eliminating the glare resulting from sunlight reflecting off the calm waters of a lake? The polarization axes are shown by the straight lines. Referring to the above question, the glare is the result of a large concentration of light aligned parallel to the water surface.
The electric field of the unpolarized light moves in every way and experiences stage changes over the lucidness time of the two light waves. At a particular wavelength, and in part enraptured light can portray itself as the blend of energized and unpolarized light. In this way, the resultant wave comprises of various waves that start indiscriminately times from iotas masterminded in respect to each other. The amplitudes of vibrations of these waves are equivalent.
Unpolarized light, when all said and done, comprises of captivated segments every which way opposite to the heading of the spread of the tide. On settling each of these polarization lines into segments along bearings that are commonly opposite to each other, unpolarized light can get considered as two different plane energized pillars with comparable size. Along these lines, when the unpolarized light gets transmitted through a polarizer, spellbound light can be acquired.
The clear majority of the regular unmistakable light sources including fluorescence and warm radiation produce indiscernible light waves. This radiation is delivered freely by a huge number of particles or molecules with arbitrary polarization edges. Polarization of a wave describes the direction of oscillation of a wave with respect to the direction of propagation; therefore, only transverse waves display polarization.
The oscillation of particles in a longitudinal wave is always in the direction of propagation; therefore, they do not display polarization.
There are three types of polarization, namely linear polarization, circular polarization, and elliptical polarization. Imagine a wave travelling through space. If the wave is a mechanical wave, particles get affected by the wave and oscillate.
If the particles oscillate on a line perpendicular to the direction of propagation, the wave is said to be linearly polarized.
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